Examples of java.util.jar.JarFile$JarEntryIterator

java.util.jar.JarFile
The JarFile class is used to read the contents of a jar file from any file that can be opened with java.io.RandomAccessFile. It extends the class java.util.zip.ZipFile with support for reading an optional Manifest entry. The Manifest can be used to specify meta-information about the jar file and its entries.
Unless otherwise noted, passing a null argument to a constructor or method in this class will cause a {@link NullPointerException} to bethrown. If the verify flag is on when opening a signed jar file, the content of the file is verified against its signature embedded inside the file. Please note that the verification process does not include validating the signer's certificate. A caller should inspect the return value of {@link JarEntry#getCodeSigners()} to further determine if the signaturecan be trusted. @author David Connelly @see Manifest @see java.util.zip.ZipFile @see java.util.jar.JarEntry @since 1.2

  }
  
  private void executeUnzip() throws Exception {
    
    File file = null;
    JarFile jar;
    Enumeration content;
    JarEntry entry;
    String classFile = "";
    String filename = "";
    long archiveDate;
    long hdDate;
    int extracted = 0;
    int processed = 0;
    
    // individuelle Manifest Sektionen
    ArrayList iSecName = new ArrayList();
    ArrayList iSecOrigin = new ArrayList();
    ArrayList iSecDate = new ArrayList();
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
    String jarDate;
    int index;
    
    // Verzeichnis der Archive einlesen
    file = new File( this.source );
    
    // alle zu durchsuchenden jar- und zip-Archive ermitteln
    String path = null;
    String[] list = null;
    
    if ( file.isDirectory() ) {
      path = this.source;
      list = this.archiveFilter(file.list());
    } else {
      path = file.getPath().substring(0,file.getPath().length()-file.getName().length());
      list = new String[1];
      list[0] = file.getName();
    }
    
    if ( list.length == 0 ) {
      this.logln("\n no jar/zip archives found");
      return;
    }
    
    if ( this.oldOverwrites )
      this.logln("\n directive: overwrite newer versions");
    else
      this.logln("\n directive: overwrite older versions");
    
    try {
      
      // alle Archive durchgehen
      for (int i=0; i<list.length; i++) {
        
        this.logln("\n unpack "+ list[i] +":");
        
        jar = new JarFile(path + list[i]);
        content = jar.entries();
        
        file = new File(path + list[i]);
        jarDate = ( file.lastModified() < 0 ) ? "unknown" : sdf.format(new Date(file.lastModified()));  
        
        // alle Klassen eines Archivs durchgehen

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    if ( jarFile==null ) throw new Exception("jarFile is null");
    if ( tobeJared==null ) throw new Exception("array of files is null");
    if ( tobeJared.length==0 ) throw new Exception("no files to archive");
    
  // Inhalt des bestehenden jars auslesen
    JarFile jar = new JarFile(jarFile);
    Enumeration jarEnum = jar.entries();
    Hashtable jarContent = new Hashtable();
    
    String elem;
    // alle Dateien eines Archivs durchgehen
    while ( jarEnum.hasMoreElements() ) {
      elem = ((JarEntry)jarEnum.nextElement()).getName();
      jarContent.put(elem, "notnull");
    }
    
    // JarFile schliessen
    jar.close();
    
  // Manifest ermitteln
    Manifest manifest = readManifestFile(manifestFile);
    if ( manifest!=null ) {
      File file = new File(manifestFile);

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  }


  public static String autoDetectPackageName(File file) {
    try {
      Set<String> packageNames = new HashSet<String>();
      JarFile jarFile = new JarFile(file);
      Enumeration<JarEntry> entries = jarFile.entries();
      while (entries.hasMoreElements()) {
        JarEntry entry = entries.nextElement();
        String name = entry.getName();
        if (name.endsWith(".class")) {
          logger.debug("Considering package of entry '{}'", name);

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      } else {
        // No version in file name, just remove the ".jar"-suffix
        bn = fileName.substring(0, fileName.length() - 4);
      }


      final JarFile bundle = new JarFile(file);
      try {
        final Manifest manifest = bundle.getManifest();
        this.mainAttributes = manifest.getMainAttributes();
        this.manifestVersion = deriveBundleManifestVersion();
        this.bsn = deriveBundleSymbolicName();
        this.version = deriveBundleVersion();
        this.name = mainAttributes.getValue(Constants.BUNDLE_NAME);


        int count = 0;
        for (Enumeration e = bundle.entries(); e.hasMoreElements();) {
          ZipEntry entry = (ZipEntry) e.nextElement();


          if (entry.getName().startsWith(SRC_PREFIX)) {
            count++;
          }
        }
        srcCount = count;


      } finally {
        if (null != bundle) {
          try {
            bundle.close();
          } catch (IOException _ioe) {
          }
        }
      }

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     *         path relative to <code>destDir</code>.
     * @throws IOException
     */
    public List extractSources(File destDir) throws IOException {
      final List res = new ArrayList();
      final JarFile jarFile = new JarFile(file);
      for (Enumeration e = jarFile.entries(); e.hasMoreElements();) {
        ZipEntry entry = (ZipEntry) e.nextElement();


        if (entry.getName().startsWith(SRC_PREFIX)) {
          if (0 == res.size()) {
            destDir.mkdirs();

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      this.file = file;
      path = Util.replace(file.getCanonicalPath().substring(1 + baseDir.getCanonicalPath().length()), "\\", "/");
    }


    public void load() throws Exception {
      JarFile    jarFile      = new JarFile(file);
      Manifest   mf           = jarFile.getManifest();
      attribs                 = mf.getMainAttributes();


      pkgExportMap     = parseNames(attribs.getValue("Export-Package"));
      pkgImportMap     = parseNames(attribs.getValue("Import-Package"));

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            } else if ("jar".equals(url.getProtocol())) {


                JarURLConnection conn = (JarURLConnection) url.openConnection();


                JarFile jar = conn.getJarFile();


                Enumeration<JarEntry> en = jar.entries();


                while (en.hasMoreElements()) {
                    JarEntry jarEntry = en.nextElement();


                    String classname = jarEntry.getName();

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              }
              copyInputStreamToFile(connection.getInputStream(), cachedFile);
            }
            if (extensionJarOrDllFile.endsWith(".jar")) {
              // Add tmp file to extension jars list
              extensionJars.add(new JarFile(cachedFile.toString(), false));
            } else if (extensionJarOrDllFile.endsWith(dllSuffix)) {
              // Add tmp file to extension DLLs map
              this.extensionDlls.put(extensionJarOrDllFileName.substring(extensionPrefix.length(), 
                  extensionJarOrDllFileName.indexOf(dllSuffix)), cachedFile.toString());
            }
            continue;
          } catch (IOException ex) {
            // Try without cache
          }          
        } 
        
        if (connection == null) {
          connection = extensionJarOrDllUrl.openConnection();
        }
        InputStream input = connection.getInputStream();          
        if (extensionJarOrDllFile.endsWith(".jar")) {
          // Copy jar to a tmp file
          String extensionJar = copyInputStreamToTmpFile(input, ".jar");
          // Add tmp file to extension jars list
          extensionJars.add(new JarFile(extensionJar, false));
        } else if (extensionJarOrDllFile.endsWith(dllSuffix)) {
          // Copy DLL to a tmp file
          String extensionDll = copyInputStreamToTmpFile(input, dllSuffix);
          // Add tmp file to extension DLLs map
          this.extensionDlls.put(extensionJarOrDllFileName.substring(extensionPrefix.length(),

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    String classFile = name.replace('.', '/') + ".class";
    InputStream classInputStream = null;
    if (this.extensionJars != null) {
      // Check if searched class is an extension class
      for (int i = 0; i < this.extensionJars.length; i++) {
        JarFile extensionJar = this.extensionJars [i];
        JarEntry jarEntry = extensionJar.getJarEntry(classFile);
        if (jarEntry != null) {
          try {
            classInputStream = extensionJar.getInputStream(jarEntry);
          } catch (IOException ex) {
            throw new ClassNotFoundException("Couldn't read class " + name, ex);
          }
        }
      }

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   */
  protected URL findResource(String name) {
    if (this.extensionJars != null) {
      // Try to find if resource belongs to one of the extracted jars
      for (int i = 0; i < this.extensionJars.length; i++) {
        JarFile extensionJar = this.extensionJars [i];
        JarEntry jarEntry = extensionJar.getJarEntry(name);
        if (jarEntry != null) {
          try {
            return new URL("jar:file:" + extensionJar.getName() + ":" + jarEntry.getName());
          } catch (MalformedURLException ex) {
            // Forget that we could have found a resource
          }
        }
      }

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